Why does a horse have to pull a cart harder during the first few steps of motion?

Explanation

To understand why a horse has to pull a cart harder during the first few steps of motion, we can break down the explanation into several key points:

### Step-by-Step Solution:

1. **Understanding Static Friction**:
- When the cart is at rest, the friction between the cart's wheels and the ground is static friction. This type of friction prevents the cart from moving.

**Hint**: Recall that static friction acts on objects that are not moving relative to each other.
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